EP1049822A1 - Filament having a trilobal cross section and a trilobal void - Google Patents

Filament having a trilobal cross section and a trilobal void

Info

Publication number
EP1049822A1
EP1049822A1 EP99902193A EP99902193A EP1049822A1 EP 1049822 A1 EP1049822 A1 EP 1049822A1 EP 99902193 A EP99902193 A EP 99902193A EP 99902193 A EP99902193 A EP 99902193A EP 1049822 A1 EP1049822 A1 EP 1049822A1
Authority
EP
European Patent Office
Prior art keywords
filament
void
trilobal
arrow
cluster
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP99902193A
Other languages
German (de)
French (fr)
Inventor
Perry Han-Cheng Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP1049822A1 publication Critical patent/EP1049822A1/en
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2935—Discontinuous or tubular or cellular core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y10T428/2975—Tubular or cellular

Definitions

  • the present invention relates to a generally trilobal filament having a central axial trilobal void useful as carpet yarn having high "glitter”, excellent durability, and good soiling resistance and, to a spinneret plate for producing the filament.
  • glitter when describing a filament used to form a carpet yarn, is a characteristic of the luster of the yarn and refers to the shiny appearance of a yarn when light is reflected by it .
  • a yarn having a high glitter is also synonymously described in the art as having a
  • the present invention is directed to a thermoplastic synthetic polymer filament which, due to its high glitter, excellent durability, and good soiling resistance, is believed to be especially useful as carpet yarn.
  • the filament of the present invention has an exterior configuration having three sides and an exterior modification ratio from about 1.4 to about 2.3 and a trilobal void extending centrally and axially therethrough. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament.
  • the trilobal void has a modification ratio in the range from about 1.4 to about 3.0 and occupies from about five percent (5%) to about thirty percent (30%) of the cross sectional area of the filament . At a given constant void percentage a decrease of modification ratio increases the degree of glitter.
  • the present invention is directed to a spinneret plate for producing the thermoplastic synthetic polymer filament as above described.
  • the spinneret plate has a cluster of three generally arrow-shaped orifices centered about a central point. Each arrow-shaped orifice is defined by a first and a second outer leg joined together at a pointed end. The pointed end of each arrow-shaped orifice is directed away from the central point of the cluster.
  • Each arrow-shaped orifice has a central leg extending from the jointure of the outer legs toward the central point of the cluster.
  • Each outer leg has a free end thereon. The free end of an outer leg of each arrow-shaped orifice is spaced from the free end of an outer leg of an adjacent orifice to define a gap therebetween. The gaps are positioned such that an extension of the central leg of each arrow-shaped orifice passes through a gap defined between the legs of the other arrow-shaped orifices.
  • Figure 1 is a cross section view of a filament in accordance with the present invention as produced in Example 1 hereof;
  • Figure 2 is a view of the bottom surface of a spinneret plate having a cluster of apertures forming therein for producing the filament shown in Figures 1 and 3 ;
  • Figure 3 is a cross section view of a filament in accordance with the present invention as produced in Example 2 hereof .
  • Figures 1 and 3 are cross section views of a thermoplastic synthetic polymer filament generally indicated by the characters 10, 10', each in accordance with the present invention.
  • the filament 10, 10' in accordance with the present invention has a three-sided exterior configuration and has an exterior modification ratio in the range from about 1.4 to about 2.3. It is specifically noted that such an exterior configuration encompasses so-called triangular (delta) -shaped as well as trilobal configurations. It should also be noted that an increased modification ratio of the exterior of the filament may result in increased soilability.
  • the filament 10, 10' as respectively illustrated in Figures 1 and 3 may be characterized as having an exterior configuration that is substantially equilaterally triangular in axial cross-section, with each side 10S, 10 'S of the filament 10, 10', respectively having a slight concavity 10C, 10' C formed therein.
  • Each concavity 10C, 10 'C lies approximately midway along a side 10S, 10 'S of the exterior configuration of the filament 10, 10'.
  • the filament 10, 10' has a trilobal void 10V, 10 'V extending centrally and axially therethrough.
  • the trilobal void 10V, 10 'V has a modification ratio (MR) in the range from about 1.4 to about 3.0.
  • the void 10V occupies from about five percent (5%) of the cross sectional area of the filament 10 to about thirty percent (30%) of the cross sectional area of the filament 10.
  • the void 10V in Figure 1 occupies about six percent (6%) of the cross sectional area of the filament 10, while the void 10 'V as illustrated in Figure 3) occupies about eighteen percent (18%) of the cross sectional area of the filament 10'.
  • the central void 10V, 10 'V is positioned with respect to the central axis 10L, 10 'L of the filaments 10, 10' such that each apex 10P, 10' P of the void 10V, 10' V extends toward the concavity 10C, 10 'C of the proximal side of the exterior configuration of the filament.
  • each apex 10P, 10 'P of the void 10V, 10 'V is generally radially aligned (along the reference line 10R, 10 'R) with the midpoint 10M, 10 'M of each side of the exterior configuration of the filament 10, 10 ' .
  • a filament in accordance with the present invention may be prepared using a synthetic, linear, thermoplastic melt-spinnable polymers, including among these polyamides, polyesters, and polyolefins. After melting the polymer is extruded ("spun") through a spinneret plate 20 (to be described hereinafter) under conditions which vary depending upon the individual polymer and the particular filament being spun thereby to produce a filament having a desired denier and a desired void percentage. Void percentage can be increased by a more rapid quenching and increasing the melt viscosity, which can slow the flow allowing sturdy, pronounced molding to occur.
  • the present invention is also directed to a spinneret plate 20 for producing the filament depicted in Figures 1 and 3.
  • a view of the bottom surface 20B of the spinneret plate 20 is shown in Figure 2.
  • a spinneret plate 20 is a relatively massive member having an upper surface and a bottom surface 20B.
  • a portion of the upper surface of the spinneret plate is provided with a bore recess whereby connection of the plate 20 to a source of polymer may be effected.
  • the lower margins of the recess may be inclined to facilitate flow of polymer from the supply to the spinneret plate. If provided, a typical angle of inclination is on the order of about one hundred fifty degrees (150°) .
  • a capillary generally indicated by the reference character 24 extends through the plate 20 from the recessed upper surface to the bottom surface 20B.
  • the capillary 24 is defined by a cluster of three generally arrow-shaped orifices 24A, 24B, and 24C.
  • the orifices 24A, 24B, and 24C are centered about a central point P.
  • Each arrow- shaped orifice is defined by a first and a second outer leg 24L-1, 24L-2 that are joined together to form a pointed end 24P.
  • Each pointed end 24P of each arrow- shaped orifice is directed away from the central point P of the cluster.
  • Each arrow-shaped orifice has a central leg 24L-3 extending from the jointure of the outer legs 24L-1, 24L-2 toward the central point P of the cluster.
  • Each outer leg 24L-1, 24L-2 has a free end 24F.
  • the free end 24F of each outer leg of each arrow-shaped orifice is spaced from the free end of an outer leg of an adjacent orifice to define a gap 24G therebetween.
  • the gaps 24G are positioned such that an extension 24E of the central leg 24L-3 of each arrow-shaped orifice 24A, 24B, or 24C passes through a gap 24G defined between the legs of the other two arrow-shaped orifices .
  • the various above-defined features of the capillary 24 that open onto the bottom surface 20B of the spinneret plate 20 are defined by parallel surfaces that extend from the bottom surface 24B for at least a portion of the way through the thickness of the plate. This distance is usually termed in the art as the "cap depth” .
  • the parallel surfaces are spaced from each other by a dimension known in the art as the "slot width" .
  • the surfaces defining the apertures of the capillary extend in parallel relationship completely through the thickness of the plate 20.
  • the parallel surfaces extend over only a predetermined portion of the thickness distance from the lower to the surface of the recess in the spinneret plate. Over the remaining portion of this thickness of the plate the surfaces defining the apertures incline outwardly from the axis of the aperture at an angle of inclination on the order of about fifty degrees (50°) .
  • the overall dimension of the slot (perpendicular to the bottom surface 20B) is usually referred to in the art as the "slot depth".
  • the slot depth is understood to include both the parallel portion of the slot and the tapered portion of the slot.
  • the spinneret plate may be fabricated using the laser technique disclosed in United States Patent 5,168,143, (Kobsa et al . , QP-4171-A) assigned to the assignee of the present invention.
  • a filament 10 having a cross-section as shown in Figure 1 and an exterior modification ratio of about 1.8 was thereby produced, the filament having a
  • the filaments were tufted to form a loop pile carpet construction.
  • the carpet was dyed to medium blue.
  • the carpet produced using the filament formed in the manner described was compared for glitter with two carpet samples formed from two trilobal cross section yarn having three and six voids, (Comparative samples A and B, respectively) and to a carpet formed from a square filament having four voids (Comparative sample C) .
  • the results are as tabulated in the following Table.
  • the glitter value in the Table was measured by ten viewers on a scale of "1" to "5", with a value of "5" being the most glitter. The rating for each sample was averaged to produce the value in the Table .
  • Comparative Examples A and B are as described in United States Patent 5,523,155 (Lin et al . , RD-6965) .
  • Comparative Example C is as described in United States Patent 5,190,821 (Goodall et al . , RD- 5865) .
  • polypropylene polymer of temperature 255°C was spun at a throughput of 303 grams/minute .
  • the filaments were then drawn through a quenching chimney having a quench airflow of 350 CFM. This drawing was done by a feed roll of speed 655 ypm which, in turn, was drawn again by the draw rolls rotating at 1611 ypm; a draw ratio of 2.5.
  • the draw roll temperature was 135°C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

A synthetic polymer filament is characterized by a trilobal void that extends centrally and axially through the filament. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The trilobal void has a modification ratio in the range from about 1.4 to about 3.0 and occupies from about five percent (5 %) to about thirty percent (30 %) of the cross-sectional area of the filament. At a given constant void percentage a decrease of modification ratio increases the degree of sparkle. A spinneret plate for producing the thermoplastic synthetic polymer filament has a cluster of three generally arrow-shaped orifices centered about a central point. Each orifice is defined by a first and a second outer leg joined together at a pointed end directed away from a central point of the cluster. Each orifice has a central leg extending from the jointure of the outer legs toward the central point of the cluster. Each outer leg has a free end thereon which is spaced from the free end of an outer leg of an adjacent orifice to define a gap therebetween.

Description

TITLE
FILAMENT HAVING A TRILOBAL CROSS-SECTION AND A TRILOBAL VOID
Background of the Invention
Field of the Invention The present invention relates to a generally trilobal filament having a central axial trilobal void useful as carpet yarn having high "glitter", excellent durability, and good soiling resistance and, to a spinneret plate for producing the filament.
Description of the Prior Art The term
"glitter", when describing a filament used to form a carpet yarn, is a characteristic of the luster of the yarn and refers to the shiny appearance of a yarn when light is reflected by it . A yarn having a high glitter is also synonymously described in the art as having a
"metallic" luster or a high degree of "sparkle".
Recently, carpet yarn having levels of glitter higher than those used in the past have become fashionable. Accordingly, it is believed desirable to provide a filament useful in forming a carpet yarn that exhibits a high degree of glitter.
Summary of the Invention
The present invention is directed to a thermoplastic synthetic polymer filament which, due to its high glitter, excellent durability, and good soiling resistance, is believed to be especially useful as carpet yarn. The filament of the present invention has an exterior configuration having three sides and an exterior modification ratio from about 1.4 to about 2.3 and a trilobal void extending centrally and axially therethrough. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The trilobal void has a modification ratio in the range from about 1.4 to about 3.0 and occupies from about five percent (5%) to about thirty percent (30%) of the cross sectional area of the filament . At a given constant void percentage a decrease of modification ratio increases the degree of glitter.
In another aspect the present invention is directed to a spinneret plate for producing the thermoplastic synthetic polymer filament as above described. The spinneret plate has a cluster of three generally arrow-shaped orifices centered about a central point. Each arrow-shaped orifice is defined by a first and a second outer leg joined together at a pointed end. The pointed end of each arrow-shaped orifice is directed away from the central point of the cluster. Each arrow-shaped orifice has a central leg extending from the jointure of the outer legs toward the central point of the cluster. Each outer leg has a free end thereon. The free end of an outer leg of each arrow-shaped orifice is spaced from the free end of an outer leg of an adjacent orifice to define a gap therebetween. The gaps are positioned such that an extension of the central leg of each arrow-shaped orifice passes through a gap defined between the legs of the other arrow-shaped orifices.
Brief Description of the Drawings
The invention will be more fully understood from the following detailed description, taken in connection with the accompanying drawings, which form a part of this application and in which:
Figure 1 is a cross section view of a filament in accordance with the present invention as produced in Example 1 hereof;
Figure 2 is a view of the bottom surface of a spinneret plate having a cluster of apertures forming therein for producing the filament shown in Figures 1 and 3 ; and
Figure 3 is a cross section view of a filament in accordance with the present invention as produced in Example 2 hereof .
Detailed Description of the Invention
Throughout the following detailed description similar reference numerals refer to similar elements in all Figures of the drawings.
Figures 1 and 3 are cross section views of a thermoplastic synthetic polymer filament generally indicated by the characters 10, 10', each in accordance with the present invention. Generally speaking, the filament 10, 10' in accordance with the present invention has a three-sided exterior configuration and has an exterior modification ratio in the range from about 1.4 to about 2.3. It is specifically noted that such an exterior configuration encompasses so-called triangular (delta) -shaped as well as trilobal configurations. It should also be noted that an increased modification ratio of the exterior of the filament may result in increased soilability.
More particularly, the filament 10, 10' as respectively illustrated in Figures 1 and 3 may be characterized as having an exterior configuration that is substantially equilaterally triangular in axial cross-section, with each side 10S, 10 'S of the filament 10, 10', respectively having a slight concavity 10C, 10' C formed therein. Each concavity 10C, 10 'C lies approximately midway along a side 10S, 10 'S of the exterior configuration of the filament 10, 10'.
The filament 10, 10' has a trilobal void 10V, 10 'V extending centrally and axially therethrough. The trilobal void 10V, 10 'V has a modification ratio (MR) in the range from about 1.4 to about 3.0. The void 10V occupies from about five percent (5%) of the cross sectional area of the filament 10 to about thirty percent (30%) of the cross sectional area of the filament 10. The void 10V in Figure 1 occupies about six percent (6%) of the cross sectional area of the filament 10, while the void 10 'V as illustrated in Figure 3) occupies about eighteen percent (18%) of the cross sectional area of the filament 10'.
In accordance with the present invention the central void 10V, 10 'V is positioned with respect to the central axis 10L, 10 'L of the filaments 10, 10' such that each apex 10P, 10' P of the void 10V, 10' V extends toward the concavity 10C, 10 'C of the proximal side of the exterior configuration of the filament. As indicated in Figures 1 and 3 each apex 10P, 10 'P of the void 10V, 10 'V is generally radially aligned (along the reference line 10R, 10 'R) with the midpoint 10M, 10 'M of each side of the exterior configuration of the filament 10, 10 ' .
A filament in accordance with the present invention may be prepared using a synthetic, linear, thermoplastic melt-spinnable polymers, including among these polyamides, polyesters, and polyolefins. After melting the polymer is extruded ("spun") through a spinneret plate 20 (to be described hereinafter) under conditions which vary depending upon the individual polymer and the particular filament being spun thereby to produce a filament having a desired denier and a desired void percentage. Void percentage can be increased by a more rapid quenching and increasing the melt viscosity, which can slow the flow allowing sturdy, pronounced molding to occur.
The present invention is also directed to a spinneret plate 20 for producing the filament depicted in Figures 1 and 3. A view of the bottom surface 20B of the spinneret plate 20 is shown in Figure 2. As is known in the art a spinneret plate 20 is a relatively massive member having an upper surface and a bottom surface 20B. A portion of the upper surface of the spinneret plate is provided with a bore recess whereby connection of the plate 20 to a source of polymer may be effected. Depending upon the rheology of the polymer being used the lower margins of the recess may be inclined to facilitate flow of polymer from the supply to the spinneret plate. If provided, a typical angle of inclination is on the order of about one hundred fifty degrees (150°) .
A capillary generally indicated by the reference character 24 extends through the plate 20 from the recessed upper surface to the bottom surface 20B. As is seen in Figure 2 the capillary 24 is defined by a cluster of three generally arrow-shaped orifices 24A, 24B, and 24C. The orifices 24A, 24B, and 24C are centered about a central point P. Each arrow- shaped orifice is defined by a first and a second outer leg 24L-1, 24L-2 that are joined together to form a pointed end 24P. Each pointed end 24P of each arrow- shaped orifice is directed away from the central point P of the cluster. Each arrow-shaped orifice has a central leg 24L-3 extending from the jointure of the outer legs 24L-1, 24L-2 toward the central point P of the cluster.
Each outer leg 24L-1, 24L-2 has a free end 24F. The free end 24F of each outer leg of each arrow-shaped orifice is spaced from the free end of an outer leg of an adjacent orifice to define a gap 24G therebetween. The gaps 24G are positioned such that an extension 24E of the central leg 24L-3 of each arrow-shaped orifice 24A, 24B, or 24C passes through a gap 24G defined between the legs of the other two arrow-shaped orifices .
The various above-defined features of the capillary 24 that open onto the bottom surface 20B of the spinneret plate 20 are defined by parallel surfaces that extend from the bottom surface 24B for at least a portion of the way through the thickness of the plate. This distance is usually termed in the art as the "cap depth" . The parallel surfaces are spaced from each other by a dimension known in the art as the "slot width" . In the production of a polyamide filament the surfaces defining the apertures of the capillary extend in parallel relationship completely through the thickness of the plate 20. For filaments made of other materials, such as polypropylene, it sometimes preferred (for considerations relating to the spinning process) that the parallel surfaces extend over only a predetermined portion of the thickness distance from the lower to the surface of the recess in the spinneret plate. Over the remaining portion of this thickness of the plate the surfaces defining the apertures incline outwardly from the axis of the aperture at an angle of inclination on the order of about fifty degrees (50°) . The overall dimension of the slot (perpendicular to the bottom surface 20B) is usually referred to in the art as the "slot depth". The slot depth is understood to include both the parallel portion of the slot and the tapered portion of the slot. The spinneret plate may be fabricated using the laser technique disclosed in United States Patent 5,168,143, (Kobsa et al . , QP-4171-A) assigned to the assignee of the present invention.
Example 1
Using a spinneret plate having a capillary 24 with a cap depth of 0.0150 inches (with no tapered portion) , a bore recess diameter in the upper surface of 0.1360 inches, and having the following dimensions for the various portions of each of the spinneret apertures as indicated by the corresponding reference characters on Figure 2 :
D (dimension) = 0.0791",
E (slot width, legs 24L-1, 24L-2) = 0.0110", F (slot width, central leg 24L-3) = 0.0085", G (dimension) = 0.0070", and H (dimension) = 0.0075", nylon 6 , 6 polymer of temperature 286°C was spun at a throughput of 326 gram/min. Ninety (90) filaments were then drawn through a quenching chimney having a quench airflow between 250 to 350 CFM. This drawing was done by a feed roll of speed 768 ypm- which, in turn, was drawn again by the draw rolls rotating at 2063 ypm; (a draw ratio of 2.7) . The draw roll temperature was 225°C. Next, a bulking jet at 240°C, 120 psi crimped the heated filaments before they moved onto the perforated surface of a bulking drum rotating at 65 rpm inside a bulking chest. Finally, the filaments were taken by a pair of take-up rolls and wound onto the winders rotating at 1891 ypm.
A filament 10 having a cross-section as shown in Figure 1 and an exterior modification ratio of about 1.8 was thereby produced, the filament having a
6.3% void percentage and a void modification ratio of 2.2. The filaments were tufted to form a loop pile carpet construction. The carpet was dyed to medium blue. The carpet produced using the filament formed in the manner described was compared for glitter with two carpet samples formed from two trilobal cross section yarn having three and six voids, (Comparative samples A and B, respectively) and to a carpet formed from a square filament having four voids (Comparative sample C) . The results are as tabulated in the following Table.
The glitter value in the Table was measured by ten viewers on a scale of "1" to "5", with a value of "5" being the most glitter. The rating for each sample was averaged to produce the value in the Table .
Table Ex.l Com . Ex . A Comp . Ex . B Com . Ex . C Glitter 5 1.7 1.0 1.6 It is also believed that for a given void percentage a filament exhibits increasing sparkle for decreasing modification ratio of the void.
Note: Comparative Examples A and B are as described in United States Patent 5,523,155 (Lin et al . , RD-6965) . Comparative Example C is as described in United States Patent 5,190,821 (Goodall et al . , RD- 5865) .
Ex-unple 2
Using the same spinneret plate as was used to produce Example 1 , polypropylene polymer of temperature 255°C was spun at a throughput of 303 grams/minute . The filaments were then drawn through a quenching chimney having a quench airflow of 350 CFM. This drawing was done by a feed roll of speed 655 ypm which, in turn, was drawn again by the draw rolls rotating at 1611 ypm; a draw ratio of 2.5. The draw roll temperature was 135°C. Next, a bulking jet at 160°C, 110 psi crimped the heated filaments before they moved onto the perforated surface of the bulking drum rotating at 50 rpm inside a bulking chest. Finally, the filaments were taken by a pair of take-up rolls and wound onto the winders . A filament 10' having a cross-section as shown in Figure 3 and an exterior modification ratio of about 1.5 was thereby produced, the filament having a 17.6% void percentage and a void modification ratio of 3.0 Those skilled in the art, having the teachings of the present invention as hereinbefore set forth may effect numerous modifications thereto. It should be appreciated that such modifications are to be construed within the contemplation of the present invention, as defined by the appended claims.

Claims

What is claimed is:
1. A thermoplastic synthetic polymer filament having an exterior configuration having three sides thereon and an exterior modification ratio in the range from about 1.4 to about 2.3, the filament having a trilobal void extending centrally and axially therethrough, each apex of the void extending toward the approximate midpoint of one side of the exterior of the filament, the trilobal void having a modification ratio in the range from about 1.4 to about 3.0, the void occupying from about five percent (5%) to about thirty percent (30%) of the cross sectional area of the filament.
2. A spinneret plate for producing a thermoplastic synthetic polymer filament having an exterior configuration having three sides and a trilobal void extending centrally and axially therethrough, the spinneret plate having a cluster of three generally arrow-shaped orifices centered about a central point, each arrow-shaped orifice being defined by a first and a second outer leg joined together at a pointed end, the pointed end of each arrow-shaped orifice being directed away from the central point of the cluster, each arrow-shaped orifice having a central leg extending from the jointure of the outer legs toward the central point of the cluster, each outer leg having a free end thereon, the free ends of an outer leg of each arrow-shaped orifice being spaced from the free end of an outer leg of an adjacent orifice to define a gap therebetween, an extension of the central leg of each arrow-shaped orifice extending through a gap defined between the legs of the other arrow-shaped orifices.
EP99902193A 1998-01-30 1999-01-11 Filament having a trilobal cross section and a trilobal void Pending EP1049822A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16384 1998-01-30
US09/016,384 US6048615A (en) 1998-01-30 1998-01-30 Filament having a trilobal cross-section and a trilobal void
PCT/US1999/000647 WO1999039029A1 (en) 1998-01-30 1999-01-11 Filament having a trilobal cross section and a trilobal void

Publications (1)

Publication Number Publication Date
EP1049822A1 true EP1049822A1 (en) 2000-11-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99902193A Pending EP1049822A1 (en) 1998-01-30 1999-01-11 Filament having a trilobal cross section and a trilobal void

Country Status (6)

Country Link
US (1) US6048615A (en)
EP (1) EP1049822A1 (en)
JP (1) JP2002501989A (en)
AU (1) AU2223199A (en)
CA (1) CA2314172A1 (en)
WO (1) WO1999039029A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6447903B1 (en) 1998-08-27 2002-09-10 E. I. Du Pont De Nemours And Company Multilobal hollow filaments having stiffening ribs and stiffening webs
US6821914B2 (en) 1999-09-07 2004-11-23 Teijin Limited Polyester fiber having deformed cross section and yarn and fabric comprising the same
DE60135596D1 (en) * 2000-03-16 2008-10-16 Kuraray Co Hollow fibers and process for producing hollow fibers
EP1209260A4 (en) * 2000-04-25 2004-11-03 Teijin Ltd Polyester fiber having deformed cross section and yarn and fabric comprising the same
ATE536550T1 (en) 2000-10-06 2011-12-15 Life Technologies Corp TRANSFECTABLE MICELLARS CONTAINING SEMICONDUCTOR NANOCRYSTALS
US6589653B2 (en) * 2001-08-08 2003-07-08 E. I. Du Pont De Nemours And Company Filament having a quadrilobate exterior cross-section and a four-sided void
US6810885B2 (en) * 2002-02-14 2004-11-02 Crown Cork & Seal Technologies Corporation Mascara brush with high durometer fibers
US7028695B2 (en) * 2002-06-18 2006-04-18 Crown Cork & Seal Technologies Corporation Mascara brush with split hollow filaments
US7264862B2 (en) * 2003-07-03 2007-09-04 Mohawk Brands Inc. Soiling detector for fabrics
US7087303B2 (en) * 2003-11-19 2006-08-08 Invista North America S.A R. L. Bulked continuous filament having a three-sided exterior cross-section and convex six-sided central void and yarn and carpet produced therefrom
EP1541724A1 (en) * 2003-11-19 2005-06-15 INVISTA Technologies S.à.r.l. Spinneret plate for producing a bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void
US20060008548A1 (en) * 2003-11-19 2006-01-12 Invista North America S.A R.L. Spinneret plate for producing a bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void
ATE440979T1 (en) * 2003-11-19 2009-09-15 Invista Tech Sarl BULKY HOLLOW FILAMENTS WITH A THREE-SIDED CROSS SECTION AND YARN AND CARPETS MADE THEREFROM
US6939608B2 (en) 2003-11-19 2005-09-06 Invista North America S.A.R.L. Bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void and yarn and carpet produced therefrom
US20050147788A1 (en) * 2003-11-19 2005-07-07 Invista North America S.A R.L. Spinneret plate for producing a bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void
CN100404732C (en) * 2005-09-19 2008-07-23 上海联吉合纤有限公司 Dacron thin-denier high-hollow short fiber and its production method
WO2010021933A2 (en) * 2008-08-22 2010-02-25 Invista Technologies S.A.R.L. Bulked continuous filaments with trilobal cross-section and round central void and spinneret plates for producing filament
WO2010021931A2 (en) * 2008-08-22 2010-02-25 Invista Technologies S.A.R.L. Bulked continuous filaments with hexalobal cross-section and theree voids and spinneret plates for producing the filament
US20100159184A1 (en) * 2008-12-18 2010-06-24 E. I. Du Pont De Nemours And Company Poly-trimethylene terephthalate solid core fibrillation-resistant filament having a substantially triangular cross section, a spinneret for producing the filament, and a carpet made therefrom
US20100159186A1 (en) * 2008-12-18 2010-06-24 E. I. Du Pont De Nemours And Company Poly-trimethylene terephthalate solid core fibrillation-resistant filament having a substantially triangular cross section, a spinneret for producing the filament, and a carpet made therefrom
US20120231207A1 (en) * 2011-03-07 2012-09-13 Moshe Rock Textile fabric with high insulation to weight ratio
US11692284B2 (en) 2016-08-18 2023-07-04 Aladdin Manufacturing Corporation Trilobal filaments and spinnerets for producing the same
USD841838S1 (en) 2016-11-04 2019-02-26 Mohawk Industries, Inc. Filament
EP3587630A1 (en) * 2018-06-26 2020-01-01 Profil Indústria e Comércio de Fios Ltda. Trilobal threads for application in dental floss, dental floss comprising the same, and use of trilobal threads in the manufacturing of dental floss

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939201A (en) * 1959-06-24 1960-06-07 Du Pont Trilobal textile filament
US2939202A (en) * 1959-12-31 1960-06-07 Du Pont Synthetic polymer textile filament
NL278885A (en) * 1962-05-24
US3329553A (en) * 1963-12-30 1967-07-04 Monsanto Co Flocked hollow filaments
US3528128A (en) * 1966-09-01 1970-09-15 Teijin Ltd Spinneret for manufacture of odd-shaped hollow filaments
US3493459A (en) * 1966-12-23 1970-02-03 Monsanto Co Complex multilobal textile filament
US3745061A (en) * 1969-02-26 1973-07-10 Du Pont Synthetic filaments having at least three continuous nonround voids
US4020229A (en) * 1975-08-07 1977-04-26 Hercules Incorporated Multi-cavity filaments
US4316924A (en) * 1979-03-26 1982-02-23 Teijin Limited Synthetic fur and process for preparation thereof
US4279053A (en) * 1979-09-24 1981-07-21 E. I. Du Pont De Nemours And Company Tri- or tetra-locular paint brush bristles
US4492731A (en) * 1982-11-22 1985-01-08 E. I. Du Pont De Nemours And Company Trilobal filaments exhibiting high bulk and sparkle
US4468830A (en) * 1983-06-24 1984-09-04 Libman Broom Company Sponge mop
JPS607045A (en) * 1983-06-27 1985-01-14 Hitachi Ltd Liquid-cooling projection-type crt
JPS60231818A (en) * 1984-04-27 1985-11-18 Kuraray Co Ltd Modified cross-section polybutylene terephthalate fiber and its manufacture
US4770938A (en) * 1985-05-13 1988-09-13 Allied Corporation Hollow trilobal cross-section filament
US4648830A (en) * 1985-05-13 1987-03-10 Allied Corporation Spinnerette for producing hollow trilobal cross-section filament
JPS62206008A (en) * 1986-03-03 1987-09-10 Teijin Ltd Crimped, porous hollow fiber and production thereof
JPS63175109A (en) * 1987-01-13 1988-07-19 Kuraray Co Ltd Fiber having particular cross-section and production thereof
US5259753A (en) * 1988-11-18 1993-11-09 E. I. Du Pont De Nemours And Company Spinneret capillaries
US5168143A (en) * 1990-01-29 1992-12-01 E. I. Du Pont De Nemours And Company Method for laser cutting metal plates
US5125818A (en) * 1991-02-05 1992-06-30 Basf Corporation Spinnerette for producing bi-component trilobal filaments
US5208107A (en) * 1991-05-31 1993-05-04 Basf Corporation Hollow trilobal cross-section filament
CZ161992A3 (en) * 1991-05-31 1993-12-15 Basf Corp Filament of a hollow three-lobe cross-section and a plate-like spinning nozzle for producing thereof
US5362563A (en) * 1991-07-24 1994-11-08 E. I. Du Pont De Nemours And Company Hollow filament cross-sections containing four continuous voids
US5230957A (en) * 1991-07-24 1993-07-27 E. I. Du Pont De Nemours And Company Hollow filament cross-sections containing four continuous voids
US5190821A (en) * 1991-07-24 1993-03-02 E. I. Du Pont De Nemours And Company Hollow filament cross-sections containing four continuous voids
CA2108382A1 (en) * 1992-12-08 1994-06-09 Arthur M. Reader Hollow trilobal cross-section fiber
US5318738A (en) * 1993-04-13 1994-06-07 E. I. Du Pont De Nemours And Company Process of making hollow polyamide filaments
US5322736A (en) * 1993-06-24 1994-06-21 Alliedsignal Inc. Hollow-trilobal cross-section filaments
US5380592A (en) * 1993-12-28 1995-01-10 E. I. Du Pont De Nemours And Company Trilobal and tetralobal cross-section filaments containing voids
JPH07238419A (en) * 1994-02-28 1995-09-12 Toray Ind Inc Readily dyeable polyester hollow fiber excellent in color development and gloss
US5523155A (en) * 1995-05-11 1996-06-04 E. I. Du Pont De Nemours And Company Filament having a triangular cross-section and 3 or 6 axially extending voids
JP3653842B2 (en) * 1996-02-07 2005-06-02 東レ株式会社 Nylon hollow fiber, its production method and its use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9939029A1 *

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JP2002501989A (en) 2002-01-22
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CA2314172A1 (en) 1999-08-05
US6048615A (en) 2000-04-11

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